Search results for "Fora"
showing 10 items of 1086 documents
Cretaceous stratigraphic scales based on benthic Foraminifera in West European basins (biochronohorizons)
1995
Säugetiere, Fisch-Otolithen, Ostracoden, Mollusken und Charophyten aus den Süßwasser- Schichten (Oligozän) von Wolfsheim im Mainzer Becken
2000
The Suswasser-Schichten (Freshwater Beds) (Oligocene) in the Mainz Basin are a paleontologically poorly studied formation. A succession of predominantly lacustrine marls from Wolfsheim can be attributed to the Suswasser-Schichten on basis of a palaeoecological and biostratigraphic analysis of its mammal teeth, fish otoliths, ostracods, mollusks, foraminifera and charophytes. The occurrence of the mammal speciesToeniodus aff.hexalophodus andIssiodoromys minor (primitive form) enables an attribution of the Suswasser-Schichten to the reference level MP 24 of the eurasiatic mammal biostratigraphic zonation. As the reference fauna of level MP 24 is believed to occur in a lithostratigraphically m…
Lower Bashkirian fusulinoideans from the upper part of the Tagnana Formation (Carboniferous, NW Algeria)
2021
The upper member of the Tagnana Formation of the Djebel Bechar Group (informally the Tagnana-3 or Tagnana Ill member) yielded fusulinoideans and other related foraminifera of the genera Pseudoendothyra (rare), Pseudostajfella (Semistaffella) (rare), Millerella, Pseudonovel/a, Plectostaffella, Eostaffella and Mediocris. The presence of Eostaffellina (rare) and Endostaffella is doubtful. The difference between Millerella and Eostaffella cannot be adequately defined by evolute versus involute coiling. Pseudonovella Kireeva, 1949 is redefined to include Seminovella Rauzer-Chernousova, 1951. The foraminifera are from two samples, one from close to the top and the other from near the base of the …
Caratterizzazione micropaleontologica a foraminiferi delle Unità litologiche argillose affioranti nella Sicilia centro-occidentale e meridionale
2011
Una fauna de foraminíferos en el Mioceno continental de la localidad de Buñol (provincia de Valencia)
1984
A fauna of benthonic forarninifera was found in the continental Miocene from Buñol (Valencia, Spain). This fauna was considered as autochthonous, Two species were identified: <i>Rosalina douvillei</i>(CUSHMAN) and <i>Quinqueloculinai seminula</i> (LINNÉ). A few number of planktonic individuals were found. These individuals were refered to the species <i>Globorotalia</i> cf. <i>mayeri</i> CUSHMAN & ELLISOR. The paleoenvironmental characteristics of this outcrops, taken into account the information obtained from benthonic foraminifera, and the bioestratigraphic data obtained from planktonic foraminifera are discussed.<br><br>En e…
Caracterización y datación de una unidad carbonática de edad noriense (fm zamoranos) en el trías de la zona subbética
1991
Ana.Marquez@uv.es; leopoldo.marquez@uv.es Dentro del Trias de facies germánica que aflora en la Zona Subbética de la Cordillera Bética, denominado Trias Sudibérico, se estudia una unidad carbonática de edad Noriense que hasta ahora había sido considerada como perteneciente a las facies Muschelkalk y de edad Ladiniense. Esta Unidad, que se define de manera formal en este trabajo como Formación Zamoranos, está constituída por tres miembros diferentes que de abajo a arriba son: Miembro Calizas carniolares (0,25 a 1,75 m de espesor), Miembro Detrítico ferruginoso (1 m de potencia media), Miembro Calizas y Dolomías laminadas (20 a 40 m de potencia). El Miembro Detrítico ferruginoso es el más dis…
Il piano di gestione dei boschi demaniali del Comune di Bivona (Provincia di Agrigento)
2014
L’area dei Monti Sicani costituisce uno dei comprensori in cui è stata realizzata la maggiore estensione di rimboschimenti di conifere della Sicilia occidentale, nell’ambito della politica di salvaguardia del territorio dal dissesto idrogeologico intrapresa dallo Stato e continuata dalla Regione. Lo stato qualitativo di queste formazioni è carente a causa di diverse ragioni: frequenti incendi, pascolo eccessivo, elevata frammentazione degli habitat naturali, mancanza di adeguati interventi selvicolturali. Da queste considerazioni emerge la necessità di conoscere e gestire più adeguatamente tali boschi attraverso la realizzazione di Piani di Gestione Forestale, strumento operativo-applicativ…
Thermal stress affects patch time allocation by preventing forgetting in a parasitoid wasp
2015
Learning and memory allow animals to adjust their foraging strategies through experience. Despite the known impact of temperature on many aspects of the behavioral ecology of animals, memory retention in the face of realistic thermal stress has seldom been assessed. In the laboratory, we studied the behavioral expression of an egg parasitoid’s (Trissolcus basalis) memory when exposed to thermal stress that could be encountered in nature. We hypothesized that thermal stress would disrupt memory consolidation and/ or modify the optimality of memory retention, thus affecting patch time allocation strategies. Memory consolidation was resilient to 1 h of thermal stress following an unrewarded ex…
Ultraviolet vision and foraging in terrestrial vertebrates
2002
Tetrachromatic colour vision, based on four ‘main’ colours and their combinations, is probably the original colour vision in terrestrial vertebrates. In addition to human visible waveband of light (400–700 nm) and three main colours, it also includes the near ultraviolet part of light spectrum (320–400 nm). The ecological importance of ultraviolet (UV) vision in animals has mainly been studied in the context of intra- and inter-sexual signalling, but recently the importance of UV vision in foraging has received more attention. Foraging animals may use either UV cues (reflectance or absorbance) of food items or UV cues of the environment. So far, all diurnal birds studied (at least 35 specie…
Mycotoxins presence in pre- and post-fermented silage from Tunisia
2020
Abstract Silage represents a major part of the feed ration for livestock, being a potential cause of mycotoxicosis as it can be contaminated with toxigenic fungi capable of producing mycotoxins in suitable environmental conditions. In the present work, the presence of natural mycotoxins in samples collected of silage from the main producing areas in Tunisia (Ariana, Bizerte, Beja and Jendouba) was assessed based on different plant material (oat, barley, triticale, artichoke, sulla or raygrass). Mycotoxins were evaluated during three periods in green forage (P1) and subsequently in ensiled products after 60 days (P2) and 100 days (P3) of fermentation. Samples were extracted by a QuEChERS pro…